Accession Number : ADA183851
Title : A Generalized Least-Squares Determination of Triaxial Stress States by X-Ray Diffraction and the Associated Errors.
Descriptive Note : Technical rept.,
Corporate Author : NORTHWESTERN UNIV EVANSTON IL DEPT OF MATERIALS SCIENCE AND ENGINEERING
Personal Author(s) : Winholtz,R A ; Cohen,J B
PDF Url : ADA183851
Report Date : Jul 1987
Pagination or Media Count : 27
Abstract : The determination of residual stresses via x-ray diffraction is briefly reviewed, with particular emphasis on the triaxial stress state. A new method is proposed for determining the general stress tensor, which considerably reduces the variances of the stresses due to counting statistics and gradients. The procedure involves a generalized least square solution of strains measured at vario us tilts of the x ray beam to the sampled and a set of tilts not heretofore used is recommended to minimize these errors.
Descriptors : *TRIAXIAL STRESSES, *X RAY DIFFRACTION, *STRESS ANALYSIS, COUNTING METHODS, STATISTICS, DETERMINATION, LEAST SQUARES METHOD, RESIDUAL STRESS, SOLUTIONS(GENERAL), TILT
Subject Categories : Mechanics
Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE